Home / 31,678.65-43,704.08-20,346.56

Finding the Fourth Proportional to 31,678.65, 43,704.08 and 20,346.56

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Solution

The fourth proportional to 31,678.65, 43,704.08 and 20,346.56 is: 28,070.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,678.65 : 43,704.08 = 20,346.56 : x
  2. Step 2: Convert to fraction form
    31,678.65/43,704.08 = 20,346.56/x
  3. Step 3: Cross multiply
    31,678.65x = 43,704.08 × 20,346.56
  4. Step 4: Simplify right side
    31,678.65x = 889,227,584.23
  5. Step 5: Solve for x
    x = 889,227,584.23/31,678.65
  6. Step 6: Final answer
    x = 28,070.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.